FlinnPREP™ Inquiry Labs for AP® Chemistry: Gravimetric Analysis of Calcium and Hard Water
By: The Flinn Staff
Item #: AP7660
The Gravimetric Analysis: Calcium and Hard Water Inquiry Lab Solution for AP® Chemistry gives students the opportunity to investigate water samples to determine the accuracy and delicacy of gravimetric analysis for water hardness testing.
Includes access to exclusive FlinnPREP™ digital content to combine the benefits of classroom, laboratory and digital learning. Each blended learning lab solution includes prelab videos about concepts, techniques and procedures, summary videos that relate the experiment to the AP® exam, built-in student lab safety training with assessments, and standards-based, tested inquiry labs with real sample data. FlinnPREP™ Inquiry Lab Solutions are adaptable to you and how you teach with multiple ways to access and run your AP® labs.
Big Idea 1, Investigation 3, Primary Learning Objective 1.19
Students investigate six water samples, representing a wide range of potential water hardness, from 50 ppm to 500 ppm, to determine the accuracy and sensitivity of gravimetric analysis for water hardness testing.
The lab begins with an introductory activity to develop skill in the calculations and techniques of gravimetric analysis, in particular, quantitative transfer and vacuum of gravity filtration. The procedure provides a model for guided-inquiry design of the cooperative class investigation. Antacid tablets are also provided as an opportunity for further inquiry—the use of the gravimetric analysis to determine the amount of calcium in an over-the-counter medication.
Complete for 24 students working in pairs.
Materials Included in Kit: Antacid tablets, bottle of 20 Calcium chloride solution, 2 M, 500 mL Calcium chloride, anhydrous, 30 g Sodium carbonate solution, 0.5 M, 500 mL, 2 Sodium carbonate, 30 g